68fe4db9013109327ebf52cadcd09435+4522998/hu016B28.fj/213.fj.gz on tb05z is missing it's last tile. On further inspection, the last portion of the GFF has no entry (therefore a 'no-call') for GFF position chr11:134946116 onwards. This lands in the middle of the next to last tile (213.00.41d8). The resulting 213.00.41d8 tile only has 261 base pairs out of the reference 463. Further, the hu016B28 213.00.41d8 tile does not have any other indel or no-call information.

The proper behavior is to explicitly fill in no-calls till the end and have the last tile full of no-calls.

The pasta tools implement this functionality and make this bug obsolete. Testing is provided in the pasta repo that does a "round-trip" conversion, from a random sequence, to GFF then back again to make sure the conversion to and from are working.